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April 2, 1929. M. J. LYNCH HOT WATER HEATER Filed oct. 28, 1926 I N V EN TOR. /Wcaei d@ :1c/z

Patented Apr. 2, 1929.

MICHAEL I, LYNCH, E DETROIT', MICHIGAN.y

' HCT-WATER HEATER.

Application filed Dctiober 28, 1926. Serial No. 144,712.

- Iviy invention relates to a new` and useful improvement in a water heater, and has for its object the provision of` a water heater which. will be econon'iical and highly etlicient in us simple in structure, and economical ot mantliacture.

Another object of the invention is the provision of a water heater 'of this class in which circulating coils are dispensed with, and tlues or tire tubesare provided so as to elect a maximum heating ot the water with the fuel consun'ied.l Y

nother object. of tl e invention is the provision in the lire tubes or `tlues ot spirally arra ged retarding means or batlles for ret-arding the passa of the heated gases therefrom.

@their objects will appear hereinafter.

The invention consists in the'combination and arrangement et parts hereinafter describen and claimed.

The invent-ion will be best understood from a relic-.rence tothe accomilianying drawings Awhich 'torni a part. of this specificationr and in which,

1 is a central vertical sectional view ot the invention with parts broken away, and parts shown in section.

Fig. is a. sectional view taken on substantia y line 2 2 of Fig. 1.

l* ig. 8 is a fragmentary perspective view otthe retarding means used in the invention. shown in the drawings, the invention is rably .de from a number o't assembled .i g '.o'nprising an outer casingf) having lower portion 10 arranged to provide a i or support. Projecting inwardly from 11 ,A this flange projecting inwardly butslight distance for supiorting purposes and leaving the interior ot the casing 9 lin communication with the compartn'ient 12 formed the base 10. The base 10 isprovided at one side vfith an opening 13 provided with a suitable clef-ure or door 14 and positioned Iin the compat-. ent 12 in a suitable gas burner 15. A boiler comprising the outer shell 16 is adag'ited tor positioning on the flange 11, 'the ilanege 11 serving as a support for this boiler. llnd walls 17 and 18 are formed on rthe boiler and tire tubes orilues 19 project through the boiler being secured at opposite ends egt the end walls 17 and 18. Arranged in owh ort the iluesor tubes 19 is a pair et y arranged strips `2O and 21, these ps extendn i' throughout the longitudinal ,i e. wall o'ithe casing 9 at its lower end. isa

length of the tubes 1-9 and being spirally ar ranged in interlocking relation as clearly seen I from Fig. 1 and F ig. 3, this interlocking rela-- tion resulting from extending the strips 20 and 21 so as to be opposed to each other. The end wall 18 is provided with an outwardly projecting iange 22 which serves to engage the upper edge of the casing 9, the wall 16 being spaced from the interior of the casing 9, and this space being lilled with a suitable insulating material 23, such as asbestos or the like. Projected through the casing 9 and through Jche wall 16 of the boiler so as to communicate with the interior thereof is an -inlet nipple 24 which may be attached to a suitable source ot water supply, such as the city supply.` The outlet nipple 25 is projected through the wall 16. and through-the casing 9 to provide outlet delivery means. A cap 26 is mounted over the upper end of the casing 9 and provided with an outlet opening or flue 27 which is controlled by a suitable damper 28.

In operation the water will be delivered to the interior ot the boiler through the inlet nipple 24 and the heated gases from the burner 15 will pass upwardly through the tubes 19, the strips 2O and 21 serving to retard. the

passage oi the gas through the tubes so as to' assure the maximum heating et the tubes by the fuel consumed and to reduce to as low a, ten'iperature as possible the heated gases,

which escape from the flue 27.

The spirally arranged strips on account et their interlocking arrangement and spiral formation serve to retard the gases sufficient for the purposes intended, while at the same time` preserving suiiicient of the natural draught to insure proper combustion.

It is evident that the damper 28 may be used to also retard the passage of the gases through the iiue 27.

The arrangement which I have provided is a simple and effect-ive one for the purposes intended, and has proven in actual use to be an economical heater of this class permitting the heating of the water to a maximum degree with a minimum amount of fuel.V

The arrangement of the device in castings such as illustrated is one which permits its economical manufacturing, and its easy and quick assembly in position.

llhile I have illustrated and described. the preferred form of structure, I do not wish to limit myself to' the precise form of structure shown, but desire to avail myself of such variations` and wlnodiicatons `as may come within the scope of the appended claim.

Having thus described my invention what I claim as new and desire to secure by Letters VPatent is:

A Water heater of the class described comprising: a Cylindrical casing open at one end; an inwardly projecting flange `adjacent the opposite end; a water container formed cylnd rical `ineerfable into said casing a peripheral fiange `on one end of Said container of a diameter equal to lthe diameter of said casinenlatinmaterial ositioned in said s )ace D 7 and a cup shaped cap mounted on the upper `end of sa'id heater embracing said casing and Said peripheral flange.

In testimony whereof I have signed the foregoing.

MICHAEL J. LYNCH. 

